Seal assembly for drill bit

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 10/22 (2006.01) E21B 10/25 (2006.01)

Patent

CA 2658668

A drill bit includes a floating journal bushing, a seal, a cutter having a seal gland for the seal and a cutter bearing surface proximate to the journal bearing, wherein the cutter bearing surface has a first inner diameter, and a journal, wherein the cutter is rotatably coupled about the journal, wherein the journal bearing is rotatably coupled about the journal, wherein the journal has a seal boss having a first diameter, and a journal bearing surface having a second diameter, and wherein the first diameter is less than the first inner diameter.

L'invention concerne un trépan de forage, comprenant une bague d'arbre flottante, un joint, un couteau pourvu d'un dispositif d'étanchéité par le joint pour l'étanchéité et une surface de support de couteau à proximité du palier d'arbre, la surface de support de couteau présentant un premier diamètre intérieur, et un arbre, le couteau étant couplé de façon rotative autour de l'arbre, le palier d'arbre étant couplé de façon rotative autour de l'arbre, l'arbre présentant une bosse d'étanchéité présentant un premier diamètre, et une surface de palier d'arbre présentant un deuxième diamètre, le premier diamètre étant inférieur du premier diamètre intérieur.

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